10440139 has 4 divisors (see below), whose sum is σ = 10989640. Its totient is φ = 9890640.

The previous prime is 10440127. The next prime is 10440161. The reversal of 10440139 is 93104401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93104401 = 13 ⋅7161877.

It is not a de Polignac number, because 10440139 - 2⁵ = 10440107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10440169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274722 + ... + 274759.

It is an arithmetic number, because the mean of its divisors is an integer number (2747410).

Almost surely, 2^10440139 is an apocalyptic number.

10440139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10440139 is a deficient number, since it is larger than the sum of its proper divisors (549501).

10440139 is an equidigital number, since it uses as much as digits as its factorization.

10440139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549500.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 10440139 is about 3231.1203939191. The cubic root of 10440139 is about 218.5590329003.

The spelling of 10440139 in words is "ten million, four hundred forty thousand, one hundred thirty-nine".